I don't know if I am coming in late and you have already placed your order!!!
I've both, here is a quick little comparison:
(new review is up!!)
one touch control (YAY!!! so much easier to alter the intensity)
no patterns (YAY!!!)
focused pin point stimulation
weaker vibrations and somewhat buzzy (on highest setting)
storage punch and cool box!
MiMi: (should have the review up by the end of today)
three button control (a little difficult to change during use)
more general/broader stimulation
dull colour choices
vibrations a strange combination of buzzy and deep (on highest setting)
no storage pouch and a boring box
Of course, both are waterproof, rechargeable (110-240v)...
If I had to recommend one to a person: if they wanted neat looking, I'd say Spirit. But if they wanted a toy to get them off no matter what it looks like, MiMi.
Hope this helps! What did you end up going with?